Increase of Hydrogen Storage Capacity of CNTs by Using Transition Metal, Metal Oxide-CNT Nanocomposites
M.M. Larijania and S. Safab
aRadiation Applications Research School, Nuclear Science and Technology Research Institute (NSTRI), Karaj, Iran
bYoung Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran
Received: December 10, 2012; In final form: April 20, 2014
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In this paper, we examined the synergetic effect of transition metals or their oxides as decorative agent with carbon nanotubes on the hydrogen storage capacity. The TiO2, Pd, and PdO shell nanoparticles were used as decorative agent on the surface of carbon nanotubes. The samples were investigated by X-ray diffraction, Raman spectroscopy and transmission electron microscopy. The thermal stability was investigated by thermogravimetric analysis testing. The hydrogen storage capacity was measured by a custom-made Sieverts apparatus. The Pd and TiO2 doped carbon nanotube shows the most marked hydrogen storage capacity, 7 times higher than pristin carbon nanotubes after 30 min storage. The results show that the hydrogen storage capacity of the PdO shell- carbon nanotube composite is very low in comparison with those of two others and does not represent a significant difference with that of carbon nanotubes.

DOI: 10.12693/APhysPolA.126.732
PACS numbers: 61.82.Rx; 68.37.Lp; 81.07.De; 88.30.R-